25270577491 has 2 divisors, whose sum is σ = 25270577492. Its totient is φ = 25270577490.

The previous prime is 25270577483. The next prime is 25270577513. The reversal of 25270577491 is 19477507252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25270577491 - 2³ = 25270577483 is a prime.

It is not a weakly prime, because it can be changed into another prime (25270577291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12635288745 + 12635288746.

It is an arithmetic number, because the mean of its divisors is an integer number (12635288746).

Almost surely, 2^25270577491 is an apocalyptic number.

25270577491 is a deficient number, since it is larger than the sum of its proper divisors (1).

25270577491 is an equidigital number, since it uses as much as digits as its factorization.

25270577491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1234800, while the sum is 49.

The spelling of 25270577491 in words is "twenty-five billion, two hundred seventy million, five hundred seventy-seven thousand, four hundred ninety-one".